scholarly journals Computer-assisted virtual planning and surgical template fabrication for frontoorbital advancement

2015 ◽  
Vol 38 (5) ◽  
pp. E5 ◽  
Author(s):  
Jehuda Soleman ◽  
Florian Thieringer ◽  
Joerg Beinemann ◽  
Christoph Kunz ◽  
Raphael Guzman
Keyword(s):  
Computer Assisted ◽  
Virtual Planning ◽  
Novel Technique ◽  
Skull Model ◽  
Computer Assisted Design ◽  
Long Term Follow Up ◽  
Frontoorbital Advancement ◽  
3D Printed ◽  
Surgical Templates

OBJECT The authors describe a novel technique using computer-assisted design (CAD) and computed-assisted manufacturing (CAM) for the fabrication of individualized 3D printed surgical templates for frontoorbital advancement surgery. METHODS Two patients underwent frontoorbital advancement surgery for unilateral coronal synostosis. Virtual surgical planning (SurgiCase-CMF, version 5.0, Materialise) was done by virtual mirroring techniques and superposition of an age-matched normative 3D pediatric skull model. Based on these measurements, surgical templates were fabricated using a 3D printer. Bifrontal craniotomy and the osteotomies for the orbital bandeau were performed based on the sterilized 3D templates. The remodeling was then done placing the bone plates within the negative 3D templates and fixing them using absorbable poly-dl-lactic acid plates and screws. RESULTS Both patients exhibited a satisfying head shape postoperatively and at follow-up. No surgery-related complications occurred. The cutting and positioning of the 3D surgical templates proved to be very accurate and easy to use as well as reproducible and efficient. CONCLUSIONS Computer-assisted virtual planning and 3D template fabrication for frontoorbital advancement surgery leads to reconstructions based on standardizedmeasurements, precludes subjective remodeling, and seems to be overall safe and feasible. A larger series of patients with long-term follow-up is needed for further evaluation of this novel technique.

scholarly journals The need for overcorrection: evaluation of computer-assisted, virtually planned, fronto-orbital advancement using postoperative 3D photography

2021 ◽  
Vol 50 (4) ◽  
pp. E5
Author(s):  
Nicole Frank ◽  
Joerg Beinemann ◽  
Florian M. Thieringer ◽  
Benito K. Benitez ◽  
Christoph Kunz ◽  
...  
Keyword(s):  
Blood Loss ◽  
Measurement Techniques ◽  
Computer Assisted ◽  
Complication Rates ◽  
Face Surface ◽  
Affected Side ◽  
Long Term Follow Up ◽  
Cad Cam ◽  
3D Printed

OBJECTIVE The main indication for craniofacial remodeling of craniosynostosis is to correct the deformity, but potential increased intracranial pressure resulting in neurocognitive damage and neuropsychological disadvantages cannot be neglected. The relapse rate after fronto-orbital advancement (FOA) seems to be high; however, to date, objective measurement techniques do not exist. The aim of this study was to quantify the outcome of FOA using computer-assisted design (CAD) and computer-assisted manufacturing (CAM) to create individualized 3D-printed templates for correction of craniosynostosis, using postoperative 3D photographic head and face surface scans during follow-up. METHODS The authors included all patients who underwent FOA between 2014 and 2020 with individualized, CAD/CAM-based, 3D-printed templates and received postoperative 3D photographic face and head scans at follow-up. Since 2016, the authors have routinely planned an additional “overcorrection” of 3 mm to the CAD-based FOA correction of the affected side(s). The virtually planned supraorbital angle for FOA correction was compared with the postoperative supraorbital angle measured on postoperative 3D photographic head and face surface scans. The primary outcome was the delta between the planned CAD/CAM FOA correction and that achieved based on 3D photographs. Secondary outcomes included outcomes with and those without “overcorrection,” time of surgery, blood loss, and morbidity. RESULTS Short-term follow-up (mean 9 months after surgery; 14 patients) showed a delta of 12° between the planned and achieved supraorbital angle. Long-term follow-up (mean 23 months; 8 patients) showed stagnant supraorbital angles without a significant increase in relapse. Postsurgical supraorbital angles after an additionally planned overcorrection (of 3 mm) of the affected side showed a mean delta of 11° versus 14° without overcorrection. The perioperative and postoperative complication rates of the whole cohort (n = 36) were very low, and the mean (SD) intraoperative blood loss was 128 (60) ml with a mean (SD) transfused red blood cell volume of 133 (67) ml. CONCLUSIONS Postoperative measurement of the applied FOA on 3D photographs is a feasible and objective method for assessment of surgical results. The delta between the FOA correction planned with CAD/CAM and the achieved correction can be analyzed on postoperative 3D photographs. In the future, calculation of the amount of “overcorrection” needed to avoid relapse of the affected side(s) after FOA may be possible with the aid of these techniques.

scholarly journals An Experimental Strategy for Capturing the Margins of Prepared Single Teeth with an Intraoral Scanner: A Prospective Clinical Study on 30 Patients

2020 ◽  
Vol 17 (2) ◽  
pp. 392 ◽  
Author(s):  
Francesco Guido Mangano ◽  
Bidzina Margiani ◽  
Ivan Solop ◽  
Nadezhda Latuta ◽  
Oleg Admakin
Keyword(s):  
Prospective Clinical Study ◽  
Computer Assisted ◽  
Marginal Adaptation ◽  
Intraoral Scanner ◽  
Experimental Strategy ◽  
Contact Points ◽  
Computer Assisted Design ◽  
Zirconia Crowns ◽  
3D Printed

Purpose: To present an experimental strategy for successfully capturing the margins of prepared single teeth with an intraoral scanner (IOS). Methods: The protocol was as follows: (1) an intraoral impression was captured with an IOS, without taking care of the visibility of the margins; (2) a partial analog impression was taken by means of a 3D-printed custom tray filled with polyvinylsiloxane light, after the removal of a retraction cord; (3) the hollow portion of the analog impression, with the preparation margins clearly visible, was scanned extraorally with the same IOS; (4) the scan of the analog impression was imported into computer-assisted-design (CAD) software, where its normals were inverted; (5) the scan with inverted normals was registered on the first intraoral scan, and replaced it; (6) the technician designed the final restoration, which was fabricated and delivered for application. The study outcomes were: (1) the marginal adaptation of the final crown; (2) the quality of interproximal contacts; and (3) the quality of occlusal contacts. Results: Thirty patients (18 males, 12 females; mean age 51.3 ± 11.6 years) were selected for this study. All these patients were restored with a monolithic translucent zirconia crown, fabricated following the aforementioned protocol. The clinical precision and the marginal adaptation of the crowns were optimal, interproximal contact points were perfect, and the only necessary adaptations were occlusal, with some minor precontacts that had to be polished. Conclusions: The present protocol seems to be compatible with the fabrication of clinically precise zirconia crowns. Further studies are needed to confirm these results.

scholarly journals Tissue Engineering and Three-Dimensional Printing in Periodontal Regeneration: A Literature Review

2020 ◽  
Vol 9 (12) ◽  
pp. 4008
Author(s):  
Simon Raveau ◽  
Fabienne Jordana
Keyword(s):  
Selective Laser Sintering ◽  
Periodontal Regeneration ◽  
Three Dimensional ◽  
Computer Assisted ◽  
Natural Polymers ◽  
Three Dimensional Printing ◽  
Computer Assisted Design ◽  
New Ideas ◽  
3D Printed ◽  
Dimensional Printing

The three-dimensional printing of scaffolds is an interesting alternative to the traditional techniques of periodontal regeneration. This technique uses computer assisted design and manufacturing after CT scan. After 3D modelling, individualized scaffolds are printed by extrusion, selective laser sintering, stereolithography, or powder bed inkjet printing. These scaffolds can be made of one or several materials such as natural polymers, synthetic polymers, or bioceramics. They can be monophasic or multiphasic and tend to recreate the architectural structure of the periodontal tissue. In order to enhance the bioactivity and have a higher regeneration, the scaffolds can be embedded with stem cells and/or growth factors. This new technique could enhance a complete periodontal regeneration. This review summarizes the application of 3D printed scaffolds in periodontal regeneration. The process, the materials and designs, the key advantages and prospects of 3D bioprinting are highlighted, providing new ideas for tissue regeneration.

scholarly journals Alternate Sequential Suture Tightening: A Novel Technique for Uncontrolled Postpartum Hemorrhage

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Sharda Brata Ghosh ◽  
Y. M. Mala
Keyword(s):  
Postpartum Haemorrhage ◽  
Internal Iliac Artery ◽  
Successful Outcome ◽  
Artery Ligation ◽  
Novel Technique ◽  
Long Term Follow Up ◽  
Internal Iliac ◽  
Fertility Potential

Objective. The most commonly described technique of modified B-Lynch suture may not be suitable for all the patients presenting with flabby, atonic uterus.Study Design. A retrospective analysis of twelve patients with uncontrolled postpartum haemorrhage, who underwent this procedure from March 2007 to September 2012, was conducted. In this novel technique, sutures are passed in the lower uterine segment and are tightened alternately to control uterine bleeding.Results. Average duration of the procedure was 4 minutes (range 2–7 minutes). Average blood loss was 1625 mL (range 1300–1900 mL). Eleven patients (91.66%) were seen to have a successful outcome with only this technique. No patient required hysterectomy and one patient (8.33%) required additional bilateral internal iliac artery ligation. All the patients had a minimum follow-up of 2 yrs and none of them reported any infertility problems.Conclusion. This technique is simple, quick, and effective. There was no adverse effect on the fertility potential for the observed 2 years; however, a long-term follow-up is required to comment on its actual rate. This technique cannot replace the standard modified B-Lynch technique for uncontrolled postpartum haemorrhage but can be used for unresponsive, flabby, and atonic uterus.

scholarly journals Virtual surgical planning and 3D printing in repeat calvarial vault reconstruction for craniosynostosis: technical note

2017 ◽  
Vol 19 (4) ◽  
pp. 490-494 ◽  
Author(s):  
Melissa LoPresti ◽  
Bradley Daniels ◽  
Edward P. Buchanan ◽  
Laura Monson ◽  
Sandi Lam
Keyword(s):  
3D Printing ◽  
Surgical Planning ◽  
3D Imaging ◽  
Surgical Intervention ◽  
Technical Note ◽  
Computer Assisted ◽  
Repeat Surgery ◽  
Computer Assisted Design ◽  
Design And Manufacturing ◽  
3D Printed

Repeat surgery for restenosis after initial nonsyndromic craniosynostosis intervention is sometimes needed. Calvarial vault reconstruction through a healed surgical bed adds a level of intraoperative complexity and may benefit from preoperative and intraoperative definitions of biometric and aesthetic norms. Computer-assisted design and manufacturing using 3D imaging allows the precise formulation of operative plans in anticipation of surgical intervention. 3D printing turns virtual plans into anatomical replicas, templates, or customized implants by using a variety of materials. The authors present a technical note illustrating the use of this technology: a repeat calvarial vault reconstruction that was planned and executed using computer-assisted design and 3D printed intraoperative guides.

Virtual Surgery in Implantology: A Systematic Review and State of the Art

2021 ◽  
pp. 10-16
Author(s):  
Kamilla Carneiro Agreli ◽  
Idiberto José Zotarelli Filho ◽  
Elias Naim Kassis
Keyword(s):  
Systematic Review ◽  
Dental Implants ◽  
Virtual Surgery ◽  
Computer Assisted ◽  
Success Rates ◽  
Oral Rehabilitation ◽  
Virtual Planning ◽  
Computer Assisted Design ◽  
Dental Rehabilitation

Introduction: Dental implant procedures have increased worldwide, reaching approximately one million dental implants per year. The optimization of faster and more accurate techniques by dentists and postoperative surgeons with better results and quality of life stimulated the development of numerous software and hardware for performing computer-guided surgeries, so-called virtual surgeries (VS). Objective: to present, through a systematic review, the main considerations of virtual surgery in dentistry and their respective advantages, disadvantages, and limitations. Methods: The model used for the review was PRISMA. We used databases such as Scielo, Lilacs, Google Scholar, PubMed. Major findings: In the scenario of VS in dentistry, advances in technology have contributed to the improvement of the models, since there was only the direct molding technique to obtain patient models, with the positioning of implants not very favorable in terms aesthetics. The information that is acquired in the 3D reconstructions allows us to determine the quantity and quality of the available bone and also allows the simulation of the installation of the implants in a virtual environment. This provides predictability of techniques and difficulties that can be encountered during surgical intervention, reducing the time and the possibility of errors, allowing the overall reduction of oral rehabilitation costs. Conclusion: Preoperative virtual planning and reconstruction of the mandible guided by dental implants through preoperative designs provide high success rates for the implant and dental rehabilitation, benefiting also prosthetic restorations supported by fixed implants. Still, the concept of using personalized implants with the help of 3D virtual treatment planning, stereolithographic models, and computer-assisted design greatly improves the mandibular restoration and helps to obtain a good facial profile, aesthetic and dental rehabilitation, avoiding complications with the grafts autologous.

scholarly journals Accuracy of Computer-Assisted Template-Based Implant Placement Using Two Different Surgical Templates Designed with or without Metallic Sleeves: A Randomized Controlled Trial

2019 ◽  
Vol 7 (2) ◽  
pp. 41 ◽  
Author(s):  
Marco Tallarico ◽  
Matteo Martinolli ◽  
Yong-Jin Kim ◽  
Fabio Cocchi ◽  
Silvio Mario Meloni ◽  
...  
Keyword(s):  
Controlled Trial ◽  
Test Group ◽  
Computer Assisted ◽  
Virtual Planning ◽  
Implant Placement ◽  
Surgical Template ◽  
Significant Difference ◽  
Cad Cam ◽  
Open Versus ◽  
Surgical Templates

Purpose: To compare virtual planning accuracy of novel computer-assisted, template-based implant placement techniques, which make use of CAD/CAM stereolithographic surgical templates with or without metallic sleeves. Furthermore, to compare open versus closed sleeves for templates without metallic sleeves. Materials and methods: Any partially edentulous patients requiring at least one implant to be placed according to a computer-assisted template-based protocol were enrolled. Patients were randomized according to a parallel group design into two arms: Surgical template with or without metallic sleeves. Three deviation parameters (angular, horizontal, vertical) were defined to evaluate the discrepancy between the planned and placed implant positions. Results: No implants failed, and no complications were experienced. Forty-one implants were placed using surgical templates with metallic sleeves while 49 implants were placed with a surgical template without metallic sleeves. Of these, 16 implants were placed through open sleeves and 33 through closed sleeves. There was a statistically significant difference in angle (p = 0.0212) and in the vertical plan (p = 0.0073) with lower values for implants placed with a surgical template without metallic sleeves. In the test group, close sleeves were more accurate compared with open sleeves in angle (p = 0.0268) and in horizontal plan (p = 0.0477). Conclusion: With the limitations of the present study, surgical templates without metallic sleeves were more accurate in the vertical plan and angle compared to the conventional template with metallic sleeves. Open sleeves should be used with caution in the molar region only in case of reduced interarch space. Further research is needed to confirm these preliminary results.

Sign in / Sign up

Export Citation Format

Share Document